Yes, same thing.
Same as mine.
Most definitely interference. Just as the Owners Manual is explicit about inspect/replace intervals, the genuine Suburu maintainance manual is explict about the interference issue and precautions that have to be taken when changing the belt.
44.5k seems early for a timing belt replacement. On the other hand, if while they had it apart they noticed some damage because of the failed water pump, replacement would have been appropriate (and arguably warranty-covered).As for now, yes, start the 30/60/90/150 cycle at 44.5
I don't know what a separater plate is. There is an issue with the oil pump o-ring and it's on something like a plate, but you only need to replace the 0-ring.